<nav class="navbar navbar-default">
 <div class="container-fluid">
   <div class="navbar-header">
     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
       <span class="sr-only">Toggle navigation</span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
     </button>
     <a class="navbar-brand" href="#"><i class="glyphicon glyphicon-heart"></i></a>
   </div>

   <!-- Collect the nav links, forms, and other content for toggling -->
   <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
     <ul class="nav navbar-nav">
       <li class="active"><a href="#">首页<span class="sr-only">(current)</span></a></li>
       <li><a href="#">日志</a></li>
	<li><a href="#">LOFTER</a></li>
	<li><a href="#">音乐</a></li>
	<li><a href="#">相册</a></li>
	<li><a href="#">收藏</a></li>
	<li><a href="#">博友</a></li>
	<li class="dropdown">
		<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">关于我们 <span class="caret"></span></a>
		<ul class="dropdown-menu" role="menu">
            <li><a href="#">走进我们</a></li>
            <li><a href="#">加入我们</a></li>
          </ul>
	</li>
     </ul>
     <form class="navbar-form navbar-right" role="search">
       <div class="form-group">
         <input type="text" class="form-control" placeholder="Search">
       </div>
       <button type="submit" class="btn btn-default">Submit</button>
     </form>
   </div>
 </div>
</nav>